Firing mechanism for firearms



F. A. STAFFORD. FIRING MECHANISM FOR FIREARMSL APPLICATION FILED APR. 27, 1917.

Patented Oct. 5, 1920.

Q BY

m A TTORNEYS i 7. serum H QEl FULTON N dent of Fulton, in the county of Qswego and State 'ofNeW: Y ork, have invented a certain new and useful Firing- Mechanism g for Firearms, ot whichthe -followingisla "specification; I p This invention has for its object a particularly' simple; and efficient firing mechanism for firearms which consists lna m1n1'- mum number of parts; and the invention .1 "consists in the p novel features and in the setforth-and claimed; I l v V H In describing this invention, reference is had to the accompanying drawings in which parts in a11the views. 20

o parts carried thereliiy. i

1 parts seen in Fig.1.

sear spring.

like characters; designate -corresponding Figure. 1 is a side elevation of "a trigger plate and contlguous partsof a firmgmech-- 1 anism embody ng my nventionn Fig. 2 is a plan ofthe trigger plate land-1 Fig. 3 is a longitudinal sectionalview of- Fig.4 is a plan of the ltriggeriand a This firing mechanism a addition to the hammer, 'main spring, firing pin andother I of which'are preferably carriedsby thetrigs 'Inent of thesear by the trigger;

I "ger plate, and springmeans' acting to hold the trigger and sear in engagement totake -upanylooseness and} also I to 'resist .move- 1f lug 2 rising therefrom, .theplate beingse- I cured to theframe 3, of the gun in well knownma'nner. here shown,the trigger plate is provided with an cenlargement l at its rearend through whiclrpasses a screw 5 which threads at its upper end mtg theft tang- 6. 1TheJlug2 is also formedwith a through said tang6. J8 is the trigger guard" threaded passage. opening through its upper end into which turns a screw 7 whichpasses which interlocks at I9'at 1 its front end in a 1 socket in the trigger plate, The "trigger guardis securedat' its rear end to the stock f-inrthe usual manneras by' lscrews passing I through; holes 10 in V the rearward extension- "11 of the trigger guard. j f, 12 designates the'searwhich is here shown l V "Specilicationot Letter siateiit to perform twofunctions 1 191-7? Serial misreadas pivotedbetween its ends at 13 to one side ofthe lug 2, it being usually located in the recess 14: in the side of said lug. The front armofthe searis 'provided with a laterally extending portion or blade 15 which en, i

,jgagesiat its end with the notch" 16in the a hammer 17; 'The rear arm of the sear is V v forme'dfwith a laterally extending portion 1 or shoulder 18 overlyingthe-upper-edge of the trigger 19. This trigger 19 extends upwardly throughy-a slot in ther trigger plate and in the;lug2,and is pivoted-tothe 'lug ,g at 20 at a point in the acombinations and constructions hereinafter pivot of the sear.

ness between the, sear and the triggerand rear and above the trigger; acts to press the trigger upwardly This spring means comprises ua flat bow against the shoulder 18 of thes'earfand to press the front arm of the sear upwardly, j y

ing alongside the lug 2 under the, sear and pressing upwardly at its front end against the lower side ofthe front 'arn of the sear 8 12, "and havingalateral'eiitension 23'at3itsrearendextending into a transverse slot 2a, in the plate of the trigger,the spring" pressing upwardly .7 against: the "upper side 101. the slot 24 and normally tending to hold ithe edge ofthe blade of the -trigger against theshoulderllofthe sear.

In operation, "ve'ry littlemovement. o fthe sear 12 releasesits. blade end-15 from the V i notch 16 oi the hammer, andwhen the ham- 1 designatesfthe triggerplate whichhas av men is cooked any loosenesscbetween the up by the rear portion 23 ofthe spring 21; This constructionoffiring mechanism is particular-13 1 advantageous in thatlthe sear is mounted upon the removable trigger plate, and owing to the arrangement of the a i Q v trigger andthe rear arm 'ofthe searistaken sear and its spring Jone spring can .beu'sed:

a What I claimis:

1 -,1."A;firing mecha nism for firearms'coma prising a frame, a detachable trigger plate,

hearing at one end against t esear and at its' opposite end on t e triggerto hold the trigger engaged'with the 'searand, resist" movement of the sear by the trigger, sl bv ends-to the trigger plate, the trigger "being located to the rear-of the pivot of the sear,

r and a bow "spring. havingitsintermediate 10 part pressing 'on the trigger plate, its frontarm pressing tpivmdl pn theisear and its rear arm pressing upwardly on the trigger to hold'the same against the'sean s bstantially as and for the purpose specified; "In testimony whereof, I have h t signed my name, at Fulton, in the county of OsWego; and'Stateof New' York, this 21st day of April, 1917. I V

namels AQsTAFFonDQ 7 

